Automatic recording mechanism.



Y PATENTED JULY 31, 1906.

I H. DARWIN.

AUTGMATIG REGURDNG MEGHANISM.

APPLIGATION FILED Aimes, 1905.

f PATENTED JULY 3l, 1905.

H. DARWIN. Y AUTOMATIC RECORDING MEGHANISM.

APPLGATION FILED AUG. 2B. 1905.

3 SHEETS-SHEET 3.

io plish the z ing-surface.

3 5 end of the arm and the recordin when thearin is 4 5 By ,employing HORACE DABWlN, OF CHESTERTON, ENGLAND.v

AUTOMATIC RECORDING MECHANISM.

Specification of Letters Patent.

.Patented July 31, F9176.

Application filed August 28, 19,05. Serial No. 276.097.

' To a/l w/tom/ t may coli/cern:

Be it known that I, HORACE DARWIN, a subject of the Kingi of England, residing at Chesterton, England, have invented certain 5- new and useful Improvements in Automatic Recording Mechanism, oi which the following is a specification. This invention relates to automatic recording mechanism, and is designed to accomfollowing results: to enable accurate records to be obtained without hotography, avoiding pen friction and at t e same time avoiding the trouble which arises from the drying o theink upon the pen when a i 5 pen is carried-by the indicator-arm; to produce records whose coordinates are rectanguiar; to enable two or more records, each distinctively colored, to be registered simultaneously upon a single recording-surface by 2o a single instrument.

According to this invention a filament which is charged with ink or s'ome other suitable recording medium is disposed parallel to but normally out oi contact with a record- 'l`he 'recording-surface is conveniently in the foi-in of ruled aper mounted upon a drum driven by cloclwork and* the fi ament is held in. a direction at right angles to that oi the motion of the recording-sur- 30 face.

The indicating-arm whose dellections are to be recorded is arranged at right angles to the filament and above it and the recordingsurface, so that the filament lies between the surface. The movement oi' this part o the indicating-arm is substantially lengthwise of the filament. T he end of the arm above the {ilament is provided with a knife-edge, so that ment to touch 4the recording-surface only at the point at which it intersects the filament, and thus causes a dot to be recorded upon the surface.

two or more filaments and providing-a..switch by means of which the measuring instrument may be connected with the indicating-ar'm-and with a device for shifting the` filaments it is possible to obtain two or inoresimultaneous records upon he saine paper lrom a single indicating-arm.

vin the accompanying drawings, which illustrate the application oi this invention to an electric measuring instrument arranged to current l'i'om two different sources alternately, such as i rom two pyrorneters,

depressed it causes the la- G, terminating in a knife-ed tends over. the highest tently Figure 1 is a perspective view oi a portion of the instrument with the clockwork removed. Fig. 2 shows a side plate as removed from the instrument with the driving-spindles passing through it. Fig. 3 is a central transverse section of the instrument.

Like letters indicate like parts throughout the drawings.

AThe recording-surface consists of a sheet of recording-pa er C, having rectangular coordinates an carried on a drum Cf having a Ispindle C2, carrying a driving-Ipimon C3 and supported in the main frame which may be provided with spirit-levels E to enable the instrument to be fixed or adjusted to the i pr'oper position. The frame D carries at the ac a galvanometer F, which may be oi any convenient form. The moving member of the galvanometer carries an indicating-arm e G which exart o the drum C.

Two filaments A an B, each charged with -ink of a distinctive color, are carried on a frame H, which is pivoted inthe main frame D. The -iilaments may be maintained at a Asuitable de ee of tension by resilient supports H. he iilaments A and B are arallel to but not in contact'with the recor ngsurface C and lie in a direction at right angles to the direction of motion of the recording-surface-that is, parallel to the axis of the recording-drum. The indicating-arm G, whose deflections are to be registered upon the recording-surface,is so disposed that one filament normally -lies betweenl the knife-edge G and the recording-surface, the excursions of the knite-edge being approximately lengthwise ofthe filament.

Extending across the instrument above the knife-edge is a bar K, havingside arms K, pivoted to the mainframe D, anda bent tappet K2 projects upward from the bar K and engages a cam L on a driven shaft L, rotatably mounted at` the top of the instrument, the eam'beirig of such a shape that at eachv ICO allowed to fall suddenly and is then gradually raised a'iain. By this'means the indicatingarm and the recording-surface are intermitso that the iilament is nipped etween the knife-edge and the recording-surface in such a manner that the niark left by the filament upon the recordingsurface isl limited to a dot.

Mounted on the cam-shaft L is a pinion L2, which engages a driving-pinion M, which is approximated,

IIG

mittenti); iotiifefl, iis heroimtel de i'l. The p )3 engages and) is diiveii a gii'oioii il,o.otiii1od' oloclwork, which mtos fiiwoss N, having a.. slot N2 on lio pifii'oii M carries sm iit @mi M2. The pinion i am independent drivfo'iif to fotate and Carry the aum iii-@ation of the arrow in Fig.

i, 1 noi'nfmllyf; prevented oiigogosvmo end M2 oi i boss li" otates the end. DI is later ioleiisod lowed to mak, one rotaboing hall tho diainetoi im tf1. tion shaft L zit tlio opposite and. carries a` l@ miiili langages ai Slot 0 in a od to the immo H. Con-- 'iffioiot 0 is 'giiloted t0 the Cl is clamped thereon by Y H2. By unolmping the iugm-:i iii'ooket can be disen @ogni fiom t vuli-pin L3, and the frame i may be consoli to Swiigg away from the imite-wigs, ris olio' iii Fig. 3. As the shaft uili-mtiitioiis it moi/ifs @1513's the ilmiionts A and i to sommet tlio galviiiioiuoi, liioiigli tho tormiiozils 'llio switfii P i on@ pivotedy arm P', lluv- Util i the o1m1k-pinii3,

lo. alternately slii'litofi bosind il is the shaft L rotations lo seguono-o of opoiations is than as follio i'ilsiiiioit ji boing in position l eo ioomilsf i sitioco C und the imitef und time swim l? boing so sot iis to uomioot tiio gz-lwivwm Vor F, tliiougli the ooir mot "ii sind to l Q to one circuit, :i halt'- iol :ii ion ol' the, t li is automatically allontis droppofi and musas tho i llio i il miiont li onto tlio mii il. alternately.

iiili mi r11 lz, tlio 'liiamont .i '..i ...#"v 1f 1V; zonioiliiioi oi too luid-revo ution uit li tho im? is mused and the knit@ (i J. 55 o g n; lui-t imo to iotun to its original disiiiwg: imm t wiHiding-surface, the imiioat* thus left treo to take up n.' Mum., At the. simio timo 'm is so. fread the Switch P Boring of the am tho lmiiwziiiii is sot ovm' iioiu iilio oontiiot Q, to the Contact @www I oiiitive ,mt of the liniizwedgo G", intormi of time sui'iiogt llow it. eating-firm to como to fi posit i'iiim under the iiiliienoe of tl. circuit 'commet-eli. Wi@ imite G" and the reco.. zippioqimatod iff; t] and o. flot iS timo me sui'i ce of a color coioairriod by the il I5 opoiatiois ms eine y meollo roooids distingoisiio: other by their colors me tiw Golding-smilie@ S at tho Emol( :nid sil-pin front, SO that the d 11u11, iiiow' into position.

it is to be undo'stooil that, struction has boon doidoiibefmei-ely us im exan'ipio oi t' .Y this invention, which may ,i i' man3 different formi; of

glo (iliiment is upg ments. in omni-tin mtos, a. sepia-iii@ cli be employed im' o5' which may Yiw flood time by mi osoiip-oi moin olookwo i' main oloclmf tlio chollo@ of uiifmcumirj;

What l claim am to sooiife by bottom l. in im automa liroiiibimitioi oi iiiozi; v1 motion to :t ioooiiliiis' insti'ui'nent i iloilootziim oratod tliiioliy and lig 'regular u uio i 'anfing tion of tile mid, si tho indiimtiiig-iiiixi and :it right :ingles to t" tho ecordiiig-sii'fiof laico amil ummm l, L tho indicating-afin to of Y some point in its imi-3th, :il resortiing-suiffiov upon snirl supp m 'prodigio (lot thoreoii.

2. in mi antwort' to? i'iioi-iioiig T29 simultaneous i'oooiiio 1': wiring; iii strument zilte-ti'iiiitolj; .nt/fi?. by ii plurali y ofldi'li'eient ogonoios, filo imiiiiiii'ilion of a support for a rooi .ii 'siuziw ixiisiiiirifoi im parting motion to said liu-tivo iii om lire z- 195 tion, :i moosuiing ii-isii'iiimgfnl, a ndioatiiigifiii operated tl movable olom of tlw I tion oppnoziinint-ely jl i faction of motion oi" iii@ muli.

senese filaments adapted to produce 1 distinctive marks on the surface, each of which filaments lies near the surface and extends at right angies. to its direction of motion, means for bringing the laments successively between the indicating-arm and the surface, means for operatively connecting the instrument successively wi th dierent agencies and meant for intermittently forcing'the indicating-arm to press a filament a ainst the surface upon said support and mar i it.

3. In an automatic device for producing simultaneous records from a measuring instrument alternately actuated by a plurality of different agencies, the combination of a support for a recording-surface means for imparting motion to the surface in one direction a measuring instrument, a deflectable indieating-arm operated thereby and freely movable clear of the surface and in a direction approximately at right angles to the direction of motion of the surface, a plurality of filaments'adapted to -produce distinctive marks upon the surface, each of which filaments lies near the surface and extends at right angles to its direction of motion, an o erating-shaft rotatable in the device, means for causing the shaft to rotate intermittently, means actu-.

ated by the shaft for bringing the filaments successively between the indicating-arm and the surface, means actuated by the shaft for operatively connecting the instrument successively with di'erent agencies, and means actuated bythe shaft for intermittently forcing the indicating-arm to press a iilament against'the surface upon the support and mark it.

4. In an automatic recording combination of a rotatable drum having a c lindrical surface supporting a recordings et, means for imparting rotation to the drum, a measuring instrument, a deflectable indicating-arm operated thereby and no'rmally out of contact with thev recording-sheet aknife-edge on the arm so arranged that the measuring instnument moves the knife-edge in a direction approximatelyl at right angles to the direction of motion of the surface of lthe drum, a marking-filament situated between the knife-edge and the recording-sheet a presser-bar over the knife-edge and means for intermittently lowering the presser-bar to force the knife-edge against the filamentl at some point in its length -and make a dotmark on the sheet.

5. In an automatic recording device the combination of a rotatable drum, supporting a recording-sheet a measuring instrument, a deflectable indicating-arm' operated thereby and normally out of contact with the sheet, a knife-edge. on the arml near the' sheet and so arranged ,that the measuring instrument moves th knife-edge in a direction approximately at right angles to the direction of motion of the sheet, a marking-filament between Y device the' the knife-edge and the sheet, a presser-bar over the knife-edge,I a rotatable shaft, a cam ,on the shaft arranged to cause the presserbar. to force the knife-edge intermittently against the lament and make a dot on the sheet, clockwork mechanism tending to rotate the shaft, an escapement device operatively connected with the drum to permit the shaft to rotate intermittently.

6. In an automatic ,recording producing simultaneous records from a measuring instrument alternately actuated by two different agencies, vthe combination of a rotatable drinn, supporting a recording-sheet, a measuring instrument, a deflectable indicating-arm operated thereby and normally device for out of contact with the sheet, a knife-edge on the arm near the sheet and so arranged that the measuring instrument moves the knifeedge in a direction approximately at right angles to the direction of motion ofthe sheet,

a pivoted frame carrying two filaments charged'with inks of different colors each of which filaments lies near the sheet and extends at right angles to its direction of niotion and can be brought bctweenthe knifeedge and the sheet by rocking the frame, av

slotted member attached to the frame,` a presser-bar over the knife-edge, means for operatively connecting the measuring instrument alternately with two different agencies, a rotatable operating-shaft, a crank on the sh'aft engaging the slotted member so as to rock thc filament-frame to one side or the other alternately, a cam on the shaft arrangedV to cause the presser-bai' to force the knife-edge intermittently against one iiilament and make a dot on the sheet, a clock- ,workniechanisin tending to rotate the shaft, an escapement device operatively connected with the drinn to permit the shaft to rotate intermittently.

7. In an automatic device for producing simultaneous records from an electric measuring instrument alternately connected with two different sources of current, the combi- IOO nation of a rotatable drum carrying a recording-sheet, an electric measuring instrument, a deilectable indicating-arm operated thereby and normally out of contact with the sheet, a knife-edge on the arm near the sheet and so arranged that the instrument moves the knife-edge in a direction approximately at right angles to the direction of motiQn of .the sheet, a pivoted frame carrying two filaments charged with inks of different colors each of which filaments lies near thesheet and extends at right angles to its direction of motion and .can be brought between the knife-edge and the vsheet by rocking the frame, a slotted member ,attached to the frame, a presserbar over the knife-edge, a switch arranged to connect the instrument alternately with the two different sources, a

slotted lever operatively connected with the' 4: y @annee Switch, a rotatable operating-shaft, a crank neeted with the drum to permit the shaft to on the shaft engaging the slotted lever and rotate intermittently.

the slotted member so as to shift the switch In testimony whereof l have signed my and to rock the filament-frame to one side or l name to this specification in the presence of 5 the other alternately, a cam on the shaft arl two euliseribing Witnesses.

l ranged to cause the presser-bar to force the l w f, v

knife-edge intermittently against one la- HOhACL DARl/u' ment and to make a dot on the sheet,elook Witnesses:

Work mechanism tending to rotate the shaft H. C. B'ELTON,

xo and an escapement device operatively con.n T. A. G. Cooiin'ion. 

